That is great that you have the original window sticker! Keep it in good shape for when you resell the truck, if you ever do so.
One day my wife was complaining about my several Mazda B-trucks that I own. I sat down and figured up everything that I ever bought for the truck that I have currently owned the longest......including the purchase price, tires, oil changes, everything! It worked out to be like $5+ dollars a month!!
Then I compared it to her 2018 Ford Escape SEL........and what SHE has paid per month for that car (we have since traded it) and I didn't include the 5K that I put down, when we bought it.
She hasn't said anything about my vehicles since then!! LOL.